1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harman [31]
3 years ago
13

Of the 800 seventh grade students and 640 eighth grade students at ​Knox Middle School, 90 students will be chosen at random to

attend an ​assembly.
​
​Which of the following would be a representative sample of ​the number of seventh and eighth grade students at the school?
Mathematics
1 answer:
Irina18 [472]3 years ago
3 0

Answer:

50 7th grade and 40 8th grade

Step-by-step explanation:

1. add to get total number of students, 1440

2. find percentage of total that are 7th grade students and 8th grade student:

640/1440 = ~45% (are 7th grade)

800/1440 = ~55% (are 8th grade)

3. 55% of 90 is 50, and 45% of 90 is 40

You might be interested in
Which of the following is equal to tan(A)?
Scrat [10]

Answer: cot B

Step-by-step explanation: if i am right mark me as brainliest

8 0
3 years ago
Please help real quick ​
malfutka [58]

Divide total km by the km in the scale:

112 / 16 = 7

The answer is A. 7 cm

6 0
3 years ago
Read 2 more answers
Acute angles Angles that measure 60°
3241004551 [841]
Acute angles are angles that measure below 90°, meaning below a right angle.
3 0
4 years ago
Read 2 more answers
Angle ABC is formed by segments AB and BC on the following coordinate grid: A coordinate grid is shown from positive 6 to negati
Nadusha1986 [10]

Answer:

B) m∠ A'B'C' = m∠ABC

Step-by-step explanation:

A rotation does not change angle measure or side length.  It preserves congruence.

This means that the image angle, A'B'C', will be congruent to the pre-image angle, ABC.

5 0
3 years ago
Read 2 more answers
Which statement is true about the radical expression square root of 25
Lena [83]

Answer:

5

Step-by-step explanation:

The square Root of 25 in its simplest form means to get the number 25 inside the radical √ as low as possible.

25 is a perfect square, which means that you can simply calculate the square Root of 25 to get the answer. 5 times 5 equals 25. Thus, the square Root of 25 in simplest radical form is = 5

3 0
3 years ago
Other questions:
  • he regular nonagon has rotational symmetry of which angle measures? Check all that apply. 40° 45° 120° 240° 260° 320°
    8·2 answers
  • Which value of x makes the equation true?<br> X + 7 = -9<br> A.-16<br> B.-2<br> C. 2<br> D.16
    7·1 answer
  • Hayley's drink coaster has a radius of 4 centimeters. What is the coaster's area? Use 3.14 for ​.
    12·1 answer
  • If two angles in a triangle measure and x degrees, then the third angle measures (90 − x) degrees.
    10·1 answer
  • Solve the following linear inequality: <br><br>3(x + 4) ≥ 5x – 123
    13·2 answers
  • 1. Nola earns $62 per week walking
    11·1 answer
  • {This question has been deleted}
    15·2 answers
  • Find x of the angles are supplementary 3x-2 and 41 degrees ?
    9·1 answer
  • What is the sum of the degrees of the exterior angles of a convex pentagon
    8·1 answer
  • Use the given information to determine which lines if any are parallel state The postulate or theorem that justifies
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!